mkdir -pv /opt/install
cd /opt/install
wget http://download.redis.io/releases/redis-2.8.7.tar.gz
tar xzf redis-2.8.7.tar.gz
cd redis-2.8.7
make -j 4 
make install

bash utils/install_server.sh

echo "vm.overcommit_memory = 1"  >> /etc/sysctl.conf 
sysctl -p